2D Spatial Homogenizer Design Based on Rectangular Optical Fiber Array

Linglin Zhuang; Zijiang Yang; Qiao Pan; Kuaisheng Zou; Weimin Shen

doi:10.3788/AOS231747

Acta Optica Sinica, Volume. 44, Issue 12, 1212005(2024)

2D Spatial Homogenizer Design Based on Rectangular Optical Fiber Array

Linglin Zhuang^1,2, Zijiang Yang^1,2, Qiao Pan^1,2、*, Kuaisheng Zou^1,2, and Weimin Shen^1,2

Author Affiliations

¹School of Optoelectronic Science and Engineering, Soochow University, Suzhou 215006, Jiangsu, China

²Key Lab of Modern Optical Technologies of Education Ministry, Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province, Soochow University, Suzhou 215006, Jiangsu, China

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Figures & Tables(12)

Fig. 1. Working diagram of a one-dimensional spatial homogenizer

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Fig. 2. Diagram of a single optical fiber

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Fig. 3. Diagram of two-dimensional spatial homogenizer

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Fig. 4. Relationship between length of rectangular optical fiber and uniformity of outgoing light spot

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Fig. 5. NF output intensity distributions of 100 mm and 1000 mm rectangular optical fibers. (a) NF output; (b) ALT cross section

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Fig. 6. Different input scenarios of optical fibers. (a) Scene 1; (b) scene 2; (c) scene 3

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Fig. 7. Diagram of FRD

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Fig. 8. FF output image of 100 mm rectangular optical fiber

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Fig. 9. FRD of 100 mm rectangular optical fiber

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Table 1. Spot uniformities in different lighting scenes

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Table 1. Spot uniformities in different lighting scenes

Length of optical fiber /mm	Uniformity /%
Length of optical fiber /mm	Scene 1 （Uniformlighting）	Scene 2 （ALT non-uniform lighting）	Scene 3 （ACT non-uniform lighting）
5	93.46	93.25	93.34
10	94.20	94.27	94.15
20	94.48	94.36	94.28
50	94.59	94.45	94.42
100	94.62	94.69	94.99

Table 2. Uniformities of 50 mm and 100 mm rectangular optical fibers under different roughnesses
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Table 2. Uniformities of 50 mm and 100 mm rectangular optical fibers under different roughnesses
Root mean squareroughness /nm Uniformity under optical fibers with different lengths /%
50 mm fiber 100 mm fiber
1 91.30 89.78
5 91.13 89.31
10 90.41 87.45

Table 3. FRD of 50 mm and 100 mm rectangular optical fibers
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Table 3. FRD of 50 mm and 100 mm rectangular optical fibers
Output F number Transmission efficiency /%
50 mm fiber 100 mm fiber
F/4 89.78 89.85
F/3.5 95.48 95.08
F/3 99.35 98.83
F/2.5 99.93 99.35

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Linglin Zhuang, Zijiang Yang, Qiao Pan, Kuaisheng Zou, Weimin Shen. 2D Spatial Homogenizer Design Based on Rectangular Optical Fiber Array[J]. Acta Optica Sinica, 2024, 44(12): 1212005

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